WO2014010827A1

WO2014010827A1 - Vehicle intrusion detection system and vehicle intrusion detection method

Info

Publication number: WO2014010827A1
Application number: PCT/KR2013/004731
Authority: WO
Inventors: 경태호
Original assignee: 대성전기공업 주식회사
Priority date: 2012-07-10
Filing date: 2013-05-30
Publication date: 2014-01-16
Also published as: EP2873567B1; KR101265468B1; US20150166010A1; EP2873567A4; JP2015530302A; EP2873567A1; CN104428176A; CN104428176B; US9610921B2

Abstract

The present invention relates to a vehicle intrusion detection system and a vehicle intrusion detection method, which are capable of effectively detecting various types of vehicle intrusions, minimizing incorrect detections, and lowering manufacturing costs of a system, and the vehicle intrusion detection system which is mounted in a vehicle to detect a vehicle intrusion comprises: a first sensor unit which detects a signal or light reflected off an object to generate a first detection signal, and which outputs the generated first detection signal; a control unit which controls an operation of the first sensor unit and receives the first detection signal from the first sensor unit; and a second sensor unit which detects a rotation, an inclination, or impact of the vehicle to generate a second detection signal, and which inputs the generated second detection signal to the control unit, wherein the first sensor unit and the second sensor unit are mounted on a single module.

Description

Vehicle Intrusion Detection System and Method

The present invention relates to a vehicle intrusion detection system and method, and more particularly, to a vehicle intrusion detection system and a vehicle used in the system that can effectively detect various types of vehicle intrusion while minimizing false detection and lowering the manufacturing cost of the system. An intrusion detection method.

Today's vehicle anti-theft systems are demanding of their performance or specification to keep the vehicle safe from situations in and out of the parked vehicle. Therefore, the recent vehicle anti-theft system has a visual and auditory effect around the vehicle in various situations such as window break detection for intrusion, stolen goods in the vehicle, tire theft detection of a parked vehicle, illegal towing and movement detection, etc. It has a function to keep the vehicle safe by generating a.

For example, the UK's Automotive Technology Institute (Thatcham) has established a separate Vehicle Security Department to continue its various activities to improve the anti-theft performance of vehicles. In addition, Denso Co., Ltd., Japan, has a location tracker for stolen vehicles, an ultrasonic sensor for detecting unauthorized intruders in the vehicle, a glass breakage sensor, a tilt sensor for detecting an inclined vehicle body, an impact sensor for detecting an impact force applied to an automobile, and the like. It is proposed a technology for maintaining vehicle security using the. Such a technique of Denso is disclosed in Korean Unexamined Patent Publication No. 10-2005-0074324 (July 18, 2005).

However, the conventional ultrasonic sensor for detecting intrusion in the vehicle has a problem of excessive discharge of the battery in order to continuously generate ultrasonic waves. In addition, the ultrasonic sensor frequently detects a change in a signal sensed in the vehicle by a simple external shock as a vehicle intrusion. In order to prevent this, it is possible to remove a signal that is outside a certain reception level range as a noise in a conventional ultrasonic sensor, and to remove it. It should be kept above the increase, thereby limiting the adjustment range of the sensor in adjusting the reception sensitivity of the ultrasonic sensor. In addition, if the reception sensitivity is maintained above a certain size, there is a problem of further increasing battery consumption.

In addition, some conventional vehicle anti-theft devices detect the occurrence of an impact on the vehicle or the inclination of the vehicle by using an inclination sensor or an impact sensor. In this case, the sensor reacts sensitively to a simple external shock and malfunctions. There are often disadvantages that occur.

The present invention has been made to solve the above-mentioned problems of the prior art, an object of the present invention is to detect the intrusion detection performance of the first sensor by using a second sensor for detecting a shock, movement or inclination to the vehicle. It is to provide a vehicle intrusion detection system and method that can be improved.

In addition, an object of the present invention is to provide a vehicle intrusion detection system and method that can reduce the manufacturing cost of the system by effectively manufacturing the first sensor and the second sensor in a single module installed in the vehicle ceiling and can effectively detect the intrusion of the vehicle. will be.

In order to solve the above technical problem, a vehicle intrusion detection system according to an aspect of the present invention, in a vehicle intrusion detection system mounted on a vehicle to detect a vehicle intrusion, the first detection signal by detecting the light or signal reflected from the object A first sensor unit generating a first sensing signal and outputting the generated first sensing signal; A controller which controls an operation of the first sensor unit and receives a first detection signal from the first sensor unit; And a second sensor unit configured to generate a second detection signal by detecting a rotation, tilt, or impact of the vehicle, and input the generated second detection signal to the controller. Here, the first sensor unit and the second sensor unit are mounted on a single module.

In one embodiment, the single module has the form of an overhead console of the vehicle.

In one embodiment, the first sensor unit, the transmitter for outputting a light or signal of a predetermined period; A receiver for receiving light or a signal reflected from an object; A signal processor for applying an outgoing signal to a transmitter according to a signal processing control signal of a controller; And a signal analyzer for analyzing a signal input through the receiver.

In one embodiment, the first sensor portion comprises an ultrasonic sensor with a transmitter and a receiver, and the second sensor portion includes a gyro sensor or an impact sensor.

In one embodiment, the controller re-investigates the vehicle intrusion by increasing the transmission level of the transmitter when the vehicle detection by the first detection signal, the transmission level of the previous transmitter when the intrusion detection investigation.

In one embodiment, the controller detects the intrusion or the impact on the vehicle by comparing the current pattern data of the first sensor unit and the previously stored pattern data of the second sensor unit to determine whether the impact.

According to an aspect of the present invention, there is provided a vehicle intrusion detection method comprising: a first sensor unit generating a first detection signal by detecting light or a signal reflected from an object, and outputting the first detection signal generated by the first sensor unit; A control unit for controlling an operation and receiving a first detection signal from a first sensor unit, generating a second detection signal by detecting a rotation, tilt, or impact of the vehicle, and a second sensor inputting the generated second detection signal to the control unit A vehicle intrusion detection method for detecting a vehicle intrusion in a vehicle intrusion detection system having a unit, comprising: a first step of investigating a vehicle intrusion based on a first detection signal received through a first sensor unit; A second step of re-investigating the vehicle intrusion by increasing the transmission level of the transmitter of the first sensor unit to be higher than the transmission level of the previous transmitter at the time of intrusion detection upon detecting the intrusion of the vehicle by the first detection signal; And detecting the intrusion or the impact on the vehicle by comparing the current first pattern data of the first sensor unit with the pre-stored second pattern data of the second sensor unit and determining whether the vehicle is impacted in the second step. It includes a third step.

In an embodiment, the first pattern data includes a voltage-time table numerically indicating in which voltage section the received data, which is input to the controller from the first sensor unit and sampled at each preset sampling time interval, is located. The pattern data averages sampling data of angular changes sampled a plurality of times at predetermined intervals over a predetermined time period, and has a corresponding integer value in which the average value is divided into predetermined steps, in which case, the third step includes: first pattern data And detecting the intrusion into the vehicle by comparing a number of s with a preset first reference value and comparing an integer value of the second pattern data with a preset second reference value.

According to the present invention, by using the second sensor unit intrusion of the vehicle while detecting various types of vehicle intrusion, such as window break detection, in-vehicle detection, in-vehicle item theft detection, vehicle tire theft detection during parking, illegal towing and movement, etc. It is possible to provide a high efficiency, high performance vehicle intrusion detection system and method that can suppress false detection of detection and lower the manufacturing cost of the system.

That is, the vehicle generated by the external simple shock or shaking by discriminating and distinguishing the external shock and the vehicle intrusion based on the detection signal of the second sensor unit (gyro sensor, etc.) and the detection signal of the first sensor (ultrasound sensor, etc.). It is possible to effectively detect various types of vehicle intrusion while improving the performance of the system by minimizing false detection of movement or tilting of the vehicle. For example, the use of the second sensor unit increases the performance of the basic vehicle intrusion detection function and minimizes the erroneous detection, and extends the vehicle intrusion detection function such as monitoring the vehicle tires off the ground or detecting illegal towing or movement. Can be done.

In addition, according to the vehicle intrusion detection system of the present invention, by installing a single module equipped with the first sensor unit and the second sensor unit in the vehicle's Overhead Console (OHC), the manufacturing cost can be reduced by modularization In addition, one module installed in the overhead console can effectively monitor intrusion into the first to third rows of vehicles.

1 is a schematic block diagram of a vehicle intrusion detection system according to an embodiment of the present invention.

FIG. 2 is a schematic block diagram of a signal analyzer that may be employed in the vehicle intrusion detection system of FIG. 1.

3 is a diagram illustrating an embodiment of a state in which a sensor module of the vehicle intrusion detection system of FIG. 1 is mounted on a vehicle.

4 is a schematic flowchart of a vehicle intrusion detection method according to an embodiment of the present invention.

5 and 6 are flowcharts illustrating a pattern processing process employable in the vehicle intrusion detection method of FIG. 4.

7 and 8 are graphs for explaining a principle of boosting a first sensor unit that may be employed in the vehicle intrusion detection method of FIG. 4.

FIG. 9 is a graph illustrating an example of a signal detected by a receiver of the vehicle intrusion detection system of FIG. 1.

FIG. 10 is a flowchart illustrating an operation principle of a second sensor unit of the vehicle intrusion detection system of FIG. 1.

FIG. 11 is a diagram for describing a mapping table that stores a signal received from the second sensor unit of FIG. 1.

FIG. 12 is a graph schematically illustrating an intrusion detection range by the second sensor unit of FIG. 1.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the description below, the term 'vehicle intrusion detection' basically means in-vehicle intrusion detection, but the detection of broken windows for intrusion, detection of stolen goods in the vehicle, detection of theft of the vehicle during parking, detection of illegal towing and movement, etc. It may include detecting various types of vehicle-related theft.

Referring to FIG. 1, the vehicle intrusion detection system according to the present embodiment 100 includes a first sensor unit 110, a control unit 120, and a second sensor unit 130. The vehicle intrusion detection system 100 is preferably installed in the vehicle 10, particularly on the upper side (vehicle ceiling, etc.) inside the vehicle for effective intrusion detection of the first sensor unit 110.

The first sensor unit 110 emits light or a signal having a predetermined period and amplitude (such as sound waves), detects light or a signal reflected from an object, generates a first detection signal, and outputs the generated first detection signal. An ultrasonic sensor or the like may be used as the first sensor unit 110.

The controller 120 is connected to the first sensor unit 110 to control the operation of the first sensor unit 110 and receives a first detection signal from the first sensor unit 110. The controller 120 may be manufactured as a single module together with the first sensor unit 110. In addition, the controller 120 may be mounted in a predetermined electronic control unit (ECU) in the vehicle.

The second sensor unit 130 generates a second detection signal by detecting a vehicle movement or a vehicle vibration or shock including a rotation or tilt, and inputs the generated second detection signal to the controller 120. As the second sensor unit 130, a gyro sensor or the like may be used.

When the first sensor unit 110 includes the ultrasonic sensor, the first sensor unit 110 includes the signal processing unit 111, the transmitter 112, the receiver 113, and the signal analysis unit 114. Can be done.

Here, the signal processor 111 corresponds to a means for applying an outgoing signal to the transmitter 112 according to a signal processing control signal of the controller 120 or a component for performing a function corresponding to the means. The signal processing unit 110 receives a pulse width modulated (PWM) pulse signal from the control unit 120 and inverts the pulse signal or a second signal and a second signal that do not invert the pulse signal. 1 may be implemented as an inverter that generates a combination of signals and transmits them to the transmitter 112. The transmitter 112 transmits an ultrasonic signal of a predetermined period in response to an outgoing signal of the signal processor 111.

The receiver 113 receives the reflected wave in which the ultrasonic signal transmitted from the transmitter 112 is reflected by the vehicle inner wall or the object. The signal analysis unit 114 amplifies the reflected wave received from the receiver 113 and detects an envelope from the amplified reflected wave and supplies it to the control unit 120. The structure which can be employ | adopted for this signal analysis part 114 is mentioned later.

In the vehicle detection system 100 according to the present embodiment, the control unit 120 may be connected to the power supply unit 11, the off switch 12, and a body control module (BCM) 13. In addition, the controller 120 may be connected to an LED indicator (not shown) indicating the state of the off switch 12 according to a signal from the controller.

Here, the off switch 12 is a user interface for deactivating or turning off the alert mode of the vehicle intrusion detection system. When the user presses the off switch 12, the control unit 120 of the vehicle intrusion detection system 100 is deactivated and does not enter the alert mode for vehicle intrusion detection.

The vehicle body control module 13 corresponds to the integration of a plurality of electronic control units (ECUs) applied to various devices of the vehicle into one central controller. The vehicle body control module 13 may operate the alarm 14 based on a signal from the controller 120 to transmit a visual and / or audio alarm around the vehicle.

In addition, the power supply unit 12 is for supplying different voltages to each component of the vehicle intrusion detection system, and may include a battery, a battery protection device, a voltage regulator, a voltage divider, or a combination thereof. The battery protection device may have a surge protector to protect each component of the battery or vehicle intrusion monitoring system from an instantaneous surge.

Referring to FIG. 2, the signal analyzer 114 according to the present embodiment includes a voltage follower 1141, a first amplifier 1142, a second amplifier 1143, a detector 1144, and an integral part. An amplifier 1145.

The voltage follower 1141 and the first amplifier 1142 amplify the input signal from the receiver 113 based on the reference voltage from the power supply 11. In this embodiment, the voltage follower 1141 and the first amplifier 1142 are preferably an OPAMP 114a having a linearity generating an output signal "1" with respect to the input signal "1".

Second amplifier 1143, detector 1144, and integrator-amplifier 1145 amplify the input signal from first amplifier 1142. In the present embodiment, the second amplifier 1143, the detector 1144, and the integrator-amplifier 1145 preferably have characteristics of a rail to rail OPAMP 114b.

Briefly explaining the operation of the signal analysis unit 114 as follows.

When the predetermined voltage V1 of the power supply unit 11 is input to the voltage follower 1141 and the reference voltage V2 of the voltage follower 1141 is input to the first amplifier 1142, it is input from the receiver 113. The reflected wave is amplified by the first amplifier 1142. The signal amplified by the first amplifier 1142 is amplified again through the second amplifier 1143 and passed through the detector 1144. At this time, the detector 1144 demodulates only the outer line of the signal to talk. The demodulated signal is amplified by the integrator-amplifier 1145 and input to the controller 120. The controller 120 is provided with an analog-to-digital converter port for converting an analog signal input from the integrator-amplifier 1145 into a digital signal.

The reflected wave corresponds to a signal that does not change in comparison with the previously interpreted reflected wave including only a coupling signal that is reflected and fed back regardless of the movement of an object in the vehicle when there is no vehicle intrusion. It corresponds to the combined wave of the reflected signal and the reflected signal that is reflected back to the object and fed back when there is. Envelope detection of the reflected wave may generate an analog signal discernable by the controller 120.

In the above-described operation of the signal analysis unit 114, if there is no change in the reflected wave received by the receiver 113, the envelope shape is not demodulated by the detector 1144 so that the reflected wave is output at a constant level, and the receiver 113 If the reflected wave received in the wave) has a change of a predetermined magnitude or more, the reflected wave is demodulated by the detector 1144 and output as a signal having a large amplitude change or frequency change.

In the vehicle intrusion detection system 100 described above with reference to FIG. 1, the first sensor unit 110 and the second sensor unit 130 may be made of a single sensor module. Of course, it is also possible to mount the control unit 120 together in a single sensor module.

For example, as shown in FIG. 3, the single sensor module 102 of this embodiment is installed in the overhead console 20 of the vehicle. The single sensor module 102 includes a first A sensor portion that monitors an area located on the left side from the center portion and a first B sensor portion that monitors an area located on the right side from the center portion in rows 1 to 3 of the vehicle.

Here, the first A sensor unit includes a first ultrasonic transmitter 112a and a first ultrasonic receiver 113a, and the first B sensor unit includes a second ultrasonic transmitter 112b and a second ultrasonic receiver 113b. In FIG. 3, the second sensor unit 130 is shown in dashed lines with a single sensor module 102 embedded in the overhead console 20.

The above-mentioned overhead console 20 is usually installed in front of the ceiling between the driver's seat and the passenger seat of the vehicle, a lamp that shines light on the driver's seat and the passenger seat, a storage box 22 for storing sunglasses, a conversation mirror, and the like. In the present embodiment, the overhead console 20 is equipped with a single module 102 in which the first sensor unit and the second sensor unit of the vehicle intrusion detection system are mounted, thereby facilitating standardization of a single module. To ensure efficient manufacturing, installation and operation

In addition, in the vehicle intrusion detection system according to the present embodiment, since the sensor module including the first sensor unit and the second sensor unit is installed in the overhead console, it is not necessary to use a separate unit for installing the intrusion detection system for the vehicle. This has the advantage of cost reduction.

Referring to FIG. 4, the vehicle intrusion detection system according to the present exemplary embodiment checks an operating state of the off switch and initial states of the first sensor unit and the second sensor unit. Checking the operation state of the off switch is to enter the alert mode when the basic system information with the body control module (BCM) is satisfied. The interface or communication between the vehicle intrusion detection system and the external BCM may be performed through LIN (Local Interconnect Network) communication.

As a result of the above confirmation, if the operating state of the off switch is activated or off (OFF), the intrusion detection system is deactivated or turned off to stop operation, and according to a predetermined process if the operating state of the off switch is not activated or off The system enters the economic mode and starts an intrusion detection operation (S401).

After the vehicle enters the alert mode, when the control unit outputs the pulse width modulation signal, the pulse width modulation signal is input to the transmitter through the transmitting inverter. The transmitter outputs a signal of a certain period and a certain width in the normal boundary mode.

If there is no intrusion into the vehicle, the signal received through the receiver has a constant level waveform with little change. In this case, the controller determines that there is no input for intrusion detection, and does not notify the BCM of a separate alarm signal.

On the other hand, when detecting an intrusion into the vehicle during the first preset time, the signal received through the receiver has a level waveform in which amplitude and frequency vary. In addition, the received signal is filtered and amplified while passing through an amplifier, and converted to an analog level through envelope detection (readable at step 1) in response to envelope detection (S402 and S403).

The input to the controller for intrusion detection may be determined by whether the signal level converted by the analog-to-digital converter provided at the input terminal of the controller is above or below a preset reference level.

Next, in order to switch to the alert mode for detecting the intrusion of the second stage after the intrusion detection of the first stage described above, the controller checks whether there is a movement detected at a predetermined level or more during the second time (in the intrusion investigation of the second stage). Corresponding) (S404, S405).

If there is a movement detected at a predetermined level or more during the second time, the control unit functions to transmit a second transmission signal boosting the first transmission signal after the second intrusion detection (S406). It is preferable that the second time interval for the second stage intrusion investigation is longer than the first time interval for the first stage intrusion investigation.

When the transmitter's boost function is used, the vehicle intrusion is detected by intermittent signals in normal times, and the vehicle intrusion is detected in three stages by the signal continuously transmitted after the second stage intrusion detection. As compared with the case of transmitting a signal, the dark current consumed by the first sensor unit can be reduced. Dark current reduction is very useful as a function of a vehicle intrusion detection system that operates by connecting a limited capacity, such as a vehicle battery, to a power source.

The controller may compare the signal input from the first sensor unit with a preset value, and transmit the alarm request signal to the BCM through the LIN communication based on the comparison result.

Next, in order to switch to the alert mode for intrusion detection of the third stage after boosting the transmission level of the first sensor unit, the controller checks whether there is a movement detected above a predetermined level for the third time (step 3). Corresponds to the intrusion investigation) (S407). Preferably, the third time interval for the intrusion detection of the third stage is longer than the second time for the intrusion detection of the two stages.

If there is no continuous movement detected above a certain level for the third time, the controller may end the current boundary mode and initialize the boundary mode. On the other hand, if there is a continuous movement detected at a predetermined level or more during the third time, the controller proceeds to the next pattern processing processor (S408).

Next, the controller compares the current pattern data of the first sensor unit with the pre-stored pattern data of the second sensor unit (S410), and determines whether the intrusion detection of the first sensor unit is caused by the impact (S411) based on the comparison result. ). These steps S410 and S411 correspond to a pattern processing process. Then, the control unit determines the shock detection and intrusion detection according to the determination result of the impact (S412, S413).

The pattern processing process indicates to filter the intrusion detection determination based on the signal input from the first sensor portion based on the input signal from the second sensor portion. By using the pattern processing process, it is possible to suppress the first sensor portion from reacting sensitively by an external simple vehicle body shock or the like. In addition, by increasing the use of the second sensor unit used in the pattern processing process, by applying an alarm function for the tilt of the vehicle body, it is possible to monitor the movement or the tilt of the vehicle body or to detect the tire ground deviation. Such a pattern processing processor will be described in more detail below.

Referring to FIG. 5, the vehicle intrusion detection system analyzes the first pattern data and the second pattern data (S4101). Here, the first pattern data is a set of signals input to the controller a plurality of times in a preset time range, and may be represented in the form of a voltage-time table or a mapping table as shown in FIG. 7 or 8. In operation S4101, the second pattern data corresponding to the first pattern data that is the current pattern data of the first sensor unit is extracted from the pattern data previously stored in the predetermined storage unit in the system, and the following steps ( S4102 to S4108).

First, the controller determines whether the size of the ultrasonic signal input to the controller is equal to or less than a preset size (for example, 2) and the frequency is 80 Hz or more (S4102). If the size of the ultrasonic signal is greater than 2 or the frequency is less than 80 kHz, the controller sets the frequency to 0 and proceeds to the next step (S4103).

Next, the controller determines whether the product of three consecutive cells of the first pattern data is four or more (S4104). If the product of three consecutive cells of the first pattern data is less than four, the controller determines that the intrusion is not invasive (S412a). That is, the control unit judges the impact here as a simple external impact.

Next, if the product of the three consecutive cells of the first pattern data is four or more, the controller determines whether the cumulative impact amount for the corresponding three consecutive cells of the second pattern data is 5 or more (S4105). If the cumulative impact amount of the second pattern data is less than 5, the controller determines that a simple external shock is detected, not an intrusion (S412b).

Next, if the cumulative impact amount of the second pattern data is 5 or more, the controller calculates a frequency sum of six neighboring cells of the first pattern data (S4106). In addition, the controller determines whether the sum of the calculated frequencies is 180 Hz or more or the average frequency is 30 Hz or more (S4107). If the sum of the frequencies is 180 Hz or more, the controller determines whether the frequency of each cell is 35 Hz or more (S4017). As a result of the determination, if the frequency of each cell of the first pattern data is 35 kHz or more, the controller determines that the intrusion detection by the first pattern data is due to an external impact rather than the actual intrusion (S412b).

Next, as shown in FIG. 6, as a result of the determination in the steps S4107 and S4108, the frequency of each cell of the first pattern data is less than 35 kHz, or if six neighboring cells of the first pattern data are present. If the sum is less than 180, the cell having the magnitude of the ultrasonic signal of the first pattern data of 3 or more and the cell of the magnitude of the impact signal of the second pattern data of 0 or more are irradiated (S4110). In addition, the control unit, in the first pattern data and the second pattern data, the magnitude of the ultrasonic signal is three or more in four consecutive cells, the sum of the frequencies of four cells is 120 Hz or more, and the magnitude of the shock signal is four consecutive cells. In step S4111, it is determined whether the condition is 0. If the condition of the step (S4111) is met, the control unit determines that the vehicle intrusion is detected (S413).

Next, if the condition of the step (S4111) does not meet, the controller examines the cell of which the size is three or more in the impact cell of the second pattern data (S4112). The controller determines whether there are eight or more cells having an impact size of 3 or more (S4113). If there are eight or more cells having a shock size of 3 or more in the second pattern data, the controller determines that the first pattern data is due to an external shock instead of invading the vehicle interior (S412C).

Next, if there are no more than eight cells having a shock size of 3 or more in the second pattern data, the controller checks the sum of frequencies of all cells in the first pattern data (S4114). The controller determines whether the sum of the frequencies of all the cells is 350 Hz or more or the average frequency is 25 Hz or more (S4115). If the sum of the frequencies of all the cells of the first pattern data is less than 350 kHz, the controller determines that the vehicle is not an interior invasion but an external impact (S412). As a result of the determination, if the sum of the frequencies of all the cells of the first pattern data is 350 Hz or more, the controller determines that the vehicle interior intrusion is detected by the pattern processing process (S413).

7 and 8 are graphs for explaining a principle of boosting a first sensor unit that may be employed in the vehicle intrusion detection method of FIG. 4. FIG. 9 is a graph illustrating an example of a signal detected by a receiver of the vehicle intrusion detection system of FIG. 1.

Referring to FIG. 7, a signal input from the first sensor unit to the controller is simplified and displayed on a voltage-time table indicating numerically which voltage section the sampled received data is located at each preset sampling time interval.

If the signal level input from the first sensor unit to the controller for a time from t0 to t2 is greater than the reference level, the controller may boost the transmission level of the transmitter of the first sensor unit for a predetermined time at time t2. Here, the reference level may be set to correspond to the level range of one step among the levels of A1 to A6.

In the above-described case, if a signal exceeding a reference level is input from the first sensor unit for a time from t0 to t2, the controller may regard it as an intrusion. This intrusion detection corresponds to detecting the intrusion before boosting the origination level of the first sensor part in the intrusion investigation of the second stage. This intrusion detection can also be applied to the intrusion investigation of the first stage.

As another embodiment, referring to FIG. 8, when the specific level A3 is set to the reference level, the controller may control the first sensor unit at predetermined time intervals t0 to t1, t1 to t2, t2 to t3, and the like. When the sampling data of the signal input to is moved up and down the reference level, the controller may detect a frequency from the input signal.

For example, in FIG. 8, since one frequency data is formed in a range of t0 to t3, the largest frequency component may be selected as a representative value by executing this four times. Such frequency data may be applied to determine whether there is a certain level of intrusion detection during the intrusion investigation of the second stage of FIG. 4.

In addition, the determination of intrusion detection using the above-described frequency data is useful when detecting the breakage of the vehicle window. As shown in FIG. 9, a large number of frequency components 901 are detected by the first sensor unit due to debris scattered into and out of the vehicle when the vehicle window is broken, and a signal input from the first sensor unit to the control unit accordingly. This is because certain frequency data is included.

FIG. 10 is a flowchart illustrating an operation principle of a second sensor unit of the vehicle intrusion detection system of FIG. 1. FIG. 11 is a diagram for describing a mapping table that stores a signal received from the second sensor unit of FIG. 1. 12 is a graph schematically illustrating an intrusion detection range by the second sensor unit of FIG. 1.

Referring to FIG. 10, the controller sets an initial value of the second sensor unit after entering the alert mode (S1001).

Next, the control unit determines the angle change in the boundary mode (S1002, S1003). If there is no change in angle, the control unit maintains the boundary mode.

Next, the controller collects data a plurality of times for a predetermined time (S1004). The predetermined time may be about 1 second to about 5 seconds as a suitable time for determining a simple external shock. In step S1004, sampling data is collected at a predetermined sampling period during a predetermined time interval.

Next, the controller may remove the impact noise with a predetermined data collection criteria (S1005). For example, as shown in FIG. 11, the controller starts collecting data through the second sensor unit when a change in an angle of a predetermined angle is detected as shown in FIG. 11, or a predetermined angle range with respect to the reference angle (hatched portion of FIG. 11). You can only collect data. In that case, an angular change outside of a certain range is removed from the collected data as impact noise. In addition, the controller of the vehicle intrusion detection system may remove the impact noise by comparing the current sampling data with the sampling data sampled immediately before and discarding a predetermined angle or more.

Next, the control unit converts the average value of the collected data (S1006). The controller may output an alarm through the BCM of the vehicle when the difference value of the average value is 4 or more, or not output the alarm value when the difference value of the average value is less than 4 (S1007, S1008, and S1009).

For example, as illustrated in FIG. 12, the controller may represent an angle change at a sampling time point as an integer value expressed in a predetermined step or level. That is, in a table in which the sampling periods for 1 to 5 times are horizontal items, and the positive and negative vertical items for the reference angles for the X and Y axes of the second sensor unit are vertical items, the angle change during the first sampling period is Substantially only in the + X axis, the average of its angles (X1) corresponds to the integer value 9 expressed in a given step, and the angular change during the second sampling period is substantially only in the + X axis, and the average of the angles (X2 ) Corresponds to the integer value 14 expressed in the predetermined step, and the angular change during the third sampling period is substantially absent, so that the average X3 of the angles corresponds to the integer value 0 expressed in the predetermined step, and the fourth The angular change during the sampling period is substantially only on the + X axis, and the mean (X4) of that angle corresponds to the integer value 19 expressed in a given step, and the angular change during the fifth sampling period is substantially + X Only, and corresponds to a constant value 18 and the average (X5) of the angle at which the image of a predetermined step. Herein, the integer value 14 is a preset value corresponding to the predetermined reference inclination angle, and each sampling period may correspond to a time obtained by dividing the reference time range to be determined as a simple external shock by five.

In FIG. 12, it is possible to determine that the sampling data for the -X-axis, the + Y-axis, and the -Y-axis are invalidated due to a condition dissatisfaction in the direction determination step. If the reference value is less than 14 and the reference for the number of inclination determinations is three or more times, the controller determines that the vehicle is inclined during the first to fifth sampling periods based on the sampling data of X2, X4, and X5. Can be.

On the other hand, the vehicle intrusion detection system of the above-described embodiment has been described to boost the transmission level of the transmitter after the first stage intrusion investigation and the second stage intrusion investigation after entering the alert mode, the three stage intrusion investigation, but the present invention is not limited to such a configuration. Instead, it may be implemented to selectively perform only one of the above-described first step intrusion investigation and second step intrusion investigation.

The foregoing embodiments are not intended to limit the scope of the present invention but are merely illustrative of the components set forth in the claims of the present invention, and are included in the technical idea throughout the specification of the present invention and in the elements of the claims. Embodiments including substitutable components as equivalents may be included in the scope of the present invention.

Claims

In a vehicle intrusion detection system mounted on a vehicle for detecting a vehicle intrusion,

A first sensor unit generating a first detection signal by sensing light or a signal reflected from an object and outputting the generated first detection signal;

A control unit which controls the operation of the first sensor unit and receives a first detection signal from the first sensor unit; And

A second sensor unit configured to generate a second detection signal by detecting a rotation, tilt, or impact of the vehicle, and input the generated second detection signal to the controller;

Including,

The control unit, based on the first detection signal filtered based on the second detection signal vehicle intrusion detection system, characterized in that for determining whether the vehicle interior intrusion detection or external simple impact.
The method of claim 1,

The first sensor unit,

A transmitter for outputting a light or signal of a predetermined period;

A receiver for receiving light or a signal reflected from an object;

A signal processor for applying an outgoing signal to the transmitter according to a signal processing control signal of the controller; And

Signal analysis unit for analyzing the signal input through the receiver

Vehicle intrusion detection system comprising a.
The method of claim 2,

The first sensor unit includes an ultrasonic sensor having the transmitter and the receiver, and the second sensor unit comprises a gyro sensor or an impact sensor.
The method of claim 2,

The controller determines the intrusion of the vehicle based on the first detection signal received through the first sensor unit, and then determines whether the second detection signal from the second sensor unit is equal to or higher than a predetermined level for a predetermined time. Detect a vehicle intrusion based on a detection signal, and upon detecting the vehicle intrusion by the first detection signal, increase the transmission level of the transmitter to be higher than the transmission level of the previous transmitter at the time of the intrusion detection and re-investigate the vehicle intrusion; Vehicle intrusion detection system.
The method of claim 4, wherein

The control unit averages sampling data of angular changes sampled a plurality of times at predetermined intervals from the second sensor unit at predetermined intervals, and divides the averaged value into predetermined steps. Of the intensity and waveform change of the signal in the voltage-time table indicating in which voltage section the first sensing signal sampled at each preset sampling time interval from the first sensor unit is within the preset reference value range. Vehicle intrusion detection system, characterized in that for detecting an intrusion or external simple shock in the vehicle interior based on at least one.
The method of claim 1,

The first sensor unit and the second sensor unit is mounted on a single module,

And wherein said single module is mounted on an overhead console of a vehicle.
A first sensor unit generating a first detection signal by sensing light or a signal reflected from an object and outputting the generated first detection signal, and controlling the operation of the first sensor unit and controlling a first detection signal from the first sensor unit In a vehicle intrusion detection system comprising a control unit for receiving a second sensor unit for generating a second detection signal by detecting the rotation, tilt or shock of the vehicle and input the generated second detection signal to the control unit, As a vehicle intrusion detection method for detecting,

After detecting the intrusion of the vehicle based on the first detection signal received through the first sensor unit, by determining whether the second detection signal from the second sensor unit is a predetermined level or more for a predetermined time, the first detection signal Determining a vehicle intrusion by the first step;

A second step of re-investigating the vehicle intrusion by increasing the transmission level of the transmitter of the first sensor unit to the transmission level at the time of detecting the vehicle intrusion in the first step when detecting the vehicle intrusion by the first detection signal; And

A third step of determining whether the vehicle interior is detected or an external simple impact based on the first detection signal filtered based on the second detection signal when the vehicle intrusion is detected for a predetermined time or more in the second step;

Vehicle intrusion detection method comprising a.
The method of claim 7, wherein

The first pattern data includes a voltage-time table for indicating in which voltage section the first sensing signal sampled at a predetermined sampling time interval from the first sensor unit is located.

The second pattern data may include a table averaging sampling data of angular changes sampled a plurality of times at predetermined intervals from the second sensor unit at predetermined intervals, and dividing the averaged values into predetermined steps.

The third step may be performed based on at least one of a signal intensity and a waveform change in the voltage-time table when an integer value of a predetermined level or more among second pattern data in the table is within a preset reference value range. Vehicle intrusion detection method characterized in that it detects an intrusion or an external simple shock.